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       1                 :            : /*
       2                 :            :  * Support for decoding of NS_* ioctl commands.
       3                 :            :  *
       4                 :            :  * Copyright (c) 2017 Nikolay Marchuk <marchuk.nikolay.a@gmail.com>
       5                 :            :  * All rights reserved.
       6                 :            :  *
       7                 :            :  * Redistribution and use in source and binary forms, with or without
       8                 :            :  * modification, are permitted provided that the following conditions
       9                 :            :  * are met:
      10                 :            :  * 1. Redistributions of source code must retain the above copyright
      11                 :            :  *    notice, this list of conditions and the following disclaimer.
      12                 :            :  * 2. Redistributions in binary form must reproduce the above copyright
      13                 :            :  *    notice, this list of conditions and the following disclaimer in the
      14                 :            :  *    documentation and/or other materials provided with the distribution.
      15                 :            :  * 3. The name of the author may not be used to endorse or promote products
      16                 :            :  *    derived from this software without specific prior written permission.
      17                 :            :  *
      18                 :            :  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
      19                 :            :  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
      20                 :            :  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
      21                 :            :  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
      22                 :            :  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
      23                 :            :  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
      24                 :            :  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
      25                 :            :  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
      26                 :            :  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
      27                 :            :  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
      28                 :            :  */
      29                 :            : 
      30                 :            : #include "defs.h"
      31                 :            : 
      32                 :            : #ifdef HAVE_LINUX_NSFS_H
      33                 :            : 
      34                 :            : # include "xlat/setns_types.h"
      35                 :            : # include <linux/ioctl.h>
      36                 :            : # include <linux/nsfs.h>
      37                 :            : # include <sys/types.h>
      38                 :            : 
      39                 :            : /* Definitions for command which have been added later */
      40                 :            : # ifndef NS_GET_NSTYPE
      41                 :            : #  define NS_GET_NSTYPE         _IO(NSIO, 0x3)
      42                 :            : # endif
      43                 :            : # ifndef NS_GET_OWNER_UID
      44                 :            : #  define NS_GET_OWNER_UID      _IO(NSIO, 0x4)
      45                 :            : # endif
      46                 :            : 
      47                 :            : int
      48                 :         55 : nsfs_ioctl(struct tcb * tcp, unsigned int code, kernel_ulong_t arg){
      49                 :            :         char *outstr;
      50                 :            :         uid_t uid;
      51         [ +  + ]:         55 :         if(entering(tcp)) {
      52      [ +  +  + ]:         40 :                 switch(code) {
      53                 :            :                         case NS_GET_USERNS:
      54                 :            :                         case NS_GET_PARENT:
      55                 :         20 :                                 return RVAL_DECODED | (1 + RVAL_FD);
      56                 :            :                         case NS_GET_OWNER_UID:
      57         [ +  + ]:         10 :                                 if (!umove(tcp, arg, &uid)) {
      58                 :          5 :                                         tprintf(", ");
      59                 :          5 :                                         printaddr(&uid);
      60                 :          5 :                                         return RVAL_DECODED | 1;
      61                 :            :                                 }
      62                 :            :                         default:
      63                 :         15 :                                 return 0;
      64                 :            :                 }
      65                 :            :         } else {
      66      [ +  +  - ]:         15 :                 switch(code) {
      67                 :            :                         case NS_GET_NSTYPE:
      68         [ -  + ]:         10 :                                 if (!syserror(tcp)) {
      69                 :          0 :                                         outstr = xlookup(setns_types, tcp->u_rval);
      70         [ #  # ]:          0 :                                         if (outstr) {
      71                 :          0 :                                                 tcp->auxstr = outstr;
      72                 :          0 :                                                 return RVAL_STR;
      73                 :            :                                         }
      74                 :            :                                 }
      75                 :         10 :                                 return 0;
      76                 :            :                         case NS_GET_OWNER_UID:
      77 [ -  + ][ #  # ]:          5 :                                 if (!syserror(tcp) && !umove(tcp, arg, &uid)) {
      78                 :          0 :                                         printuid(", uid = ", uid);
      79                 :            :                                 }
      80                 :            :                         default:
      81                 :         55 :                                 return 0;
      82                 :            :                 }
      83                 :            :         }
      84                 :            : }
      85                 :            : #endif /* HAVE_LINUX_NSFS_H */